Re: [boost] [Config] Support for switching between std:: andboost:: equivalents.

Subject: Re: [boost] [Config] Support for switching between std:: andboost:: equivalents.
From: Peter Dimov (lists_at_[hidden])
Date: 2015-06-07 13:29:32

John Maddock wrote:

> Right.  But if lib X prefers/needs to use the Boost version always, they 
> don't have to use this mechanism.

What I'm saying is more like lib X has a dual interface, but _the user_ of 
lib X wants to use the boost:: version, whereas lib X detects C++11 and 
provides the std:: version.

Lib X is

#if CXX11

void libx_f( std::regex const & rx );

#else

void libx_f( boost::regex const & rx );

#endif

but the user wants to continue using boost::regex under C++11.

This could in principle be addressed in some way by giving the user the 
option to override libX's decision to go with std::regex.